单项选择题

A.顶宽0.5m,底宽1.5m,高0.8m
B.顶宽0.9m,底宽1.1m,高0.8m
C.顶宽0.6m,底宽1.4m,高0.8m
D.顶宽0.7m,底宽1.3m,高0.8m